PL
W pracy przedstawiono skutki zabudowy hydrotechnicznej potoku i jej wpływ na zmianę wybranych parametrów hydraulicznych koryta. Reżim przepływu w korytach jest charakteryzowany przez rozkład prędkości wody w pionach hydrometrycznych, wartość naprężeń stycznych na dno, wartość mocy strumienia oraz wartość mocy jednostkowej strumienia. Założono sześć przekrojów poprzecznych na potoku Cedron w Beskidzie Średnim, w których zostały wykonane pomiary prędkości na kilku głębokościach nad dnem przed i po regulacji, a następnie obliczono naprężenia styczne na dnie cieku, całkowite i jednostkowe moce strumienia i przeprowadzono analizę obliczonych parametrów.
EN
The paper presents the effects of applied river engineering works and its influence on the changes of chosen hydraulics parameters along a reach of the mountainous stream. It was done by presenting the regime of the stream before and after river engineering works. The key parameters used for the hydraulics analysis were: stream velocity, shear stresses, stream power and finally the unit stream power. The research area was located in Polish Carpathians in the Beskid Sredni Mountains. The research stream is called the Cedron and the research reach is located close to Radziszow municipality around 30 kilometers from Krakow. The research was carried out in 2003 (before the river engineering works, after the major flooding in the region) and in 2004 after finishing river training works, which were mostly targeted to stop the bottom of the river and its banks from erosion. To carry on the research 6 cross sections were chosen where detailed velocities of running water were measured in the velocity profiles. Later the rest of analyzed hydraulics parameters such as stream power and shear stresses were calculated. The results were presented in graphical manner (fig. 1-4) and analyzed. In final conclusions it was pointed out, that all river training works hale the inevitable influence on river regime changes, thus after river engineering works which had a place on the left bank of the Cedron river (where special river bank protection gabions were installed) the shear stresses acting on the river bed and banks were stabilized.